Zelton



(Nd Model.)

, P DLHAZEL'TON! CARBON HOLDER FOR ELECTRIC'ARG LAMPS.

Patented J'u1y25, 1893";

v No. 501,938.

UNITED STAT S PATENT OFFI E.

FREDERIO DANA HAZELTON, OF NEW YORK, N. Y., ASSIGNOR TO SIGMUNDBERGMANN, OF SAME PLACE.

CARBON-HOLDER FOR ELECTRIC-ARC LAMPS.

SPECIFIGATION forming part of Letters Patent No. 501,938, dated July 25,1893.

Applicationfiled January 10, 1893- fier'ial No. 457,884. (No model.) 7

To all whom it may concern:

Be it known that I, FREDERIC DANA HA- ZELTON, a citizen of the UnitedStates, and a resident of New York, in the county of New York and Stateof New York, have invented certain new and useful Improvements inCarbon-Holders for Electric-Arc Lamps, of which the following is aspecification.

My invention relates to carbon holders for electric arc lamps and oneobject of my invention is to construct a carbon holder by which theupper carbon can be moved to any required position so as to be properlyadjusted with referenceto the lower carbon.

Another object of my invention is to construct a carbon holder in whichcarbons of varying diameter say from one-half to fiveeighths of an inchmay be inserted and securely held.

A further object of my invention is to construct a carbon holder whichgrasps but a small portion of the length of the carbon thus reducingwaste of carbon.

In the accompanying drawings forming a part of this specification Figure1 represents a front view of the preferred form of my invention. Fig. 2is a side elevation. Fig. 3 is a plan view looking upwardly of Fig. 2.Figs. 4. and 5 represent respectively front and side elevations of amodified form of my invention.

Referring to the drawings 1 is a portion of the toothed brass rod orrack bar which cooperates with the mechanism of an arc lamp (not shown).To the lower end of this bar and to but a small portion in length of thesame I secure my carbon holder. This I construct as follows: I take a Ushaped casting Y the carbon is held and pressed against two sides of thesame. Screw-threaded lugs 7 are formed on the lateral adjuster 6 toreceive the screvs threaded ends of the clamping screws 8 and 9 thelatter being provided with a handle.

The clamping bar 10 is provided with two openings through which thescrews Sand 9 readily pass their heads bearing on the outside of thesame. Between this clamping bar and the lugs of the lateral adjuster andsurrounding the stems of the screws are placed the spiral springs 11which act to force the clamping bar outwardly against the heads of thescrews. The lateral adjuster 6 being held frictionally by the screw 5 iscapable of a certain amount of lateral movement determined by the space12 left between it and the lower side of the cross-wise adjuster. Thecross-wise adjuster and the lateral adjuster formsubstantially auniversal joint and permit the point of the carbon to be accuratelyadjusted. As will be seen from an inspection of the drawings thedistance from the top of the cross-wise adjuster to the bottom of thelateral adjuster is very small much space being thus economized both asregards the toothed rod and the small portion of the carbon that isgrasped by the holder.

When insertinga new carbon into my holder I merely loosen screw 9 orboth screws 8 and 9 to a suffioient extent so that the burned carbon canbe removed. A new carbon is then inserted between the clamping bar andthe frame of the lateral adjuster and the screw or screws againtightened. As the clamping bar canbe adjusted nearer to or farther fromthe frame of the said adjuster it is evident that carbons of varyingdiameter can be clamped in myholder.

In Figs-4. and 5 which represent amodification the U shaped cross-wiseadjuster 2' is suspended from the rack bar 1 being frictionally pivotedthereto, and the lateral adj uster 6 is suspended from the lower part ofthe cross-Wise adjuster being frictionally pivoted thereto. The clampingbar 10' is similar to the clamping bar 10 in Fig. 1, and the clampingscrews 8 and 9 and springs 11 are the same as those in Figs. 1 to 3. Theoperation is substantially the same.

Having thus described my invention, what I claim, and desire to secureby Letters Patent,'is

1. In combination with the rack bar, a crosswise adjuster frictionallysecured thereto, a lateral adjuster frictionall secured to thecross-wise adjuster so as to have a movement at right angles to'thelatter, a clamping bar; and screws for holding the carbon firmly inplace, substantially as described.

2. In combination with the rack bar, a U- shaped cross-wiseadjusterfrictionallysecured thereto, a lateral adjuster frictionallysecured to the cross-Wise adjuster, a clamping bar springs and screwsfor holding the carbon firmly in place, substantially as described.

3. In combination with the rack bar, a U- shaped cross-wise adjusterfrictionally secured to the rack bar so as to extend laterallytherefrom a lateral adjuster pivoted to the crosswise adjuster so as toextend downward -and under the same, and clamping means for. holdingacarbon in place, substantially vas described. a

- 4. lncombination with the rack bar,a U- shapedcross wiseadjusterfrictionallysecured i to the rack bar so as to extendlaterallytherafrom, a lateral adjuster pivoted to the crosswise adjuster so as toextend downward and under the same, a clamping bar, springs and screwsfor holding the carbon firmlyin place, substantially as described/ 5. Ina carbon holder for an arc lamp the combination with'the adjusterreceiving the end of the carbon, of a clamping bar, screws which passthrough openings in the clamping bar and screw into the said adjusterand spiral springs surrounding the said screws and bearing on theclamping bar, substantially'as described.

Signed at New York, in the county of New York and State of New York,this 30th day of December, A. D. 1892.

FREDERIG DANA ZHAZtE-LTON.

Wi tn esses:

P. H. KLEIN, J12, S. BERGMANN.

